XGN15-12(SF6) switchgear

**I. Definition and Characteristics**

1. **Definition**

-The XGN15-12(SF6) switchgear is an indoor AC high-voltage sulfur hexafluoride ring network switchgear with a rated voltage of 12kV. It is mainly used for ring network power supply and terminal power supply in power systems to realize the control, protection, and monitoring of power lines.

2. **Characteristics**

- **Miniaturized design**: Compact structure and small floor area, suitable for installation in places with limited space. For example, in power distribution rooms or small substations in cities, it can effectively save space.

- **Fully sealed structure**: Adopting fully sealed SF6 insulating gas, it has good insulation performance and arc extinguishing ability, which can improve the reliability and safety of the equipment. It can effectively prevent the influence of external environmental factors such as dust and moisture on the inside of the equipment.

- **Safe and simple operation**:

Equipped with a complete operating mechanism and interlocking device to ensure the safety of operators. The operation process is simple and clear and easy to master.

**II. Structural Composition**

1. **Cabinet body**

- Made of high-quality steel, it has sufficient strength and rigidity to bear the weight of internal equipment and external mechanical stress. The surface of the cabinet body is treated with anti-corrosion, which improves the durability of the equipment. - The cabinet body is divided into multiple compartments, including busbar compartment, circuit breaker compartment, cable compartment, etc. Each compartment is independent of each other and is isolated by insulating partitions to ensure the safety of the equipment.

2. **Electrical components**

- **Load switch**:

It is one of the core components of the switchgear and is used to connect and disconnect the circuit. It has the characteristics of strong breaking capacity and long operating life. Under normal working conditions, the load switch can reliably connect and disconnect the circuit. When a fault occurs, it can quickly cut off the fault current.

- **Fuse**: Used in conjunction with the load switch to provide short-circuit protection function. When a short-circuit fault occurs in the circuit, the fuse can quickly melt and cut off the fault current to protect the safety of equipment and lines.

- **SF6 gas insulation system**:

Adopting SF6 gas as the insulating medium, it has good insulation performance and arc extinguishing ability. SF6 gas forms a uniform insulating layer inside the equipment to ensure the safe operation of the equipment under high voltage.

- **Operating mechanism**: Used to control the operation of load switches and fuses. It has two operation modes: manual and electric. The operating mechanism is reasonably designed, flexible and reliable in operation, and can meet the needs of different users.

**III. Application Fields**

1. **Urban distribution network**: Suitable for ring network power supply and terminal power supply in cities, and can meet the demand for urban power load growth. For example, in residential areas, commercial centers, industrial parks and other places in cities, it provides reliable power supply for users.

2. **Industrial and mining enterprises**

: It can be used in the power distribution system of industrial and mining enterprises to provide stable power guarantee for production equipment. In industrial and mining enterprises, there are higher requirements for the reliability and safety of power equipment. The XGN15-12(SF6) switchgear can meet these requirements.

3. **Railways and rail transit**:

It also has a wide range of applications in railway and rail transit systems. Provide power supply for signal equipment, communication equipment, lighting equipment, etc. to ensure the normal operation of railway and rail transit systems.

**IV. Installation and Maintenance**

1. **Installation requirements**

- **Installation environment**:

It should be installed in a place with dry, good ventilation and no violent vibration and impact. Avoid installing it in an environment with high humidity, corrosive gases or a lot of dust to avoid affecting the performance and service life of the equipment.

- **Foundation requirements**:

A solid foundation is required. Generally, concrete foundation is used. When the cabinet body is installed on the foundation, the levelness and verticality should meet the requirements to ensure the stable operation of the equipment.

- **Wiring requirements**:

The wiring of high-voltage cables should comply with relevant standards and specifications to ensure a firm and reliable connection. At the same time, insulation treatment of cables should be done well to prevent leakage and short-circuit accidents.

2. **Maintenance points**

- **Regular inspection**:

Regularly inspect the switchgear, including appearance inspection, electrical connection inspection, operating mechanism inspection, etc. Discover potential problems of the equipment in time and take corresponding measures for treatment.

- **Gas pressure monitoring**:

Since the switchgear uses SF6 gas insulation, it is necessary to regularly monitor the gas pressure. Ensure that the gas pressure is within the normal range to ensure the insulation performance and arc extinguishing ability of the equipment.

-**Cleaning and maintenance**:

Regularly clean the switchgear and remove dust and dirt on the surface of the equipment. Keeping the equipment clean helps improve the heat dissipation performance and insulation performance of the equipment.

- **Fault handling**:

When a fault occurs in the switchgear, fault diagnosis and treatment should be carried out in time. According to the fault phenomenon, analyze the fault cause and take corresponding repair measures. During the fault handling process, safety operation procedures should be strictly observed to ensure the safety of operators.